Abstract
Experiments are described on the behavior of a wind vane that is constructed in such a way that it is forced to oscillate about the wind direction. The forcing is accomplished by allowing the upwind edge of the vane's fin to jibe back and forth between two detents. The frequency of the oscillation is found to be directly proportional to the wind speed. For a given wind speed, the frequency varies with the square root of the fin area and the inverse square root of the anemometer's moment of inertia. The response time of the device is proportional to the inverse of the frequency.
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